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Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Sep. 30, 2024
--- | --- | ---
Other Intangible Assets [Abstract] |  |
Carrying Amount | $ 575,409 | $ 581,691
Accumulated Amortization | (458,531) | (455,665)
Net | 116,878 | 126,026
Definite-lived trade names |  |
Other Intangible Assets [Abstract] |  |
Carrying Amount | 151,104 | 151,598
Accumulated Amortization | (128,854) | (127,829)
Net | 22,250 | 23,769
Customer relationships |  |
Other Intangible Assets [Abstract] |  |
Carrying Amount | 375,040 | 380,387
Accumulated Amortization | (313,665) | (311,621)
Net | 61,375 | 68,766
Copyrights/patents/other |  |
Other Intangible Assets [Abstract] |  |
Carrying Amount | 18,725 | 19,166
Accumulated Amortization | (16,012) | (16,215)
Net | 2,713 | 2,951
Indefinite-lived trade names |  |
Other Intangible Assets [Abstract] |  |
Carrying Amount | 30,540 | 30,540
Net | $ 30,540 | $ 30,540

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- Definition Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible assets having statutory or estimated useful lives, and the carrying amount of any indefinite-lived intangible assets. + References No definition available. + Details
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